Yeast leavened bread dough composition and process of manufacture



United States Patent 3 494,770 YEAST LEAVENED RREAD DOUGH COMPOSI- TION AND PROCESS OF MANUFACTURE Louis Joseph Smerak, Wayne, and Jason Alden Miller, Dover, N.J., assignors to Caravan Products Co., Inc., Passaic, N.J., a corporation of New York No Drawing. Filed July 19, 1966, Ser. No. 566,212

Int. Cl. A21d 2/02 US. Cl. 99-90 16 Claims ABSTRACT OF THE DISCLOSURE A yeast leavened bread dough containing a composition consisting essentially of about 0.0005 to 0.013 part by weight per 100 parts of flour employed in said dough of an oxidizing agent, about 0.03 to 0.5 part by weight of ammonium salt per 100 parts flour employed in said dough, and catalytically active quantities of enzyme selected from the class consisting of fungal alpha amylase and fungal protease, wherein said fungal alpha amylase enzyme is sufficient to provide between 3,000 and 150,000 SKB units for 100 pounds of flour employed in said dough and said fungal protease enzyme is suflicient to provide between 3,000 and 50,000 hemoglobin units for 100 pounds of flour employed in said dough.

This invention relates to yeast raised baked products and to a process for manufacturing such products.

The process of fermentation has always played an important role in the manufacture of yeast leavened bakery products. It has been recognized to impart many valuable properties to the dough and to the ultimate baked products. For example, it is the process of fermentation which generates the gases necessary to achieve good and uniform loaf volume; it is fermentation which assists in achieving the proper extensibility of the bread which in turn affects the ability of the dough to be sheeted out; it is fermentation which promotes the ease with which the dough can be processed, particularly by machinery; and it is fermentation which contributes to the flavor, aroma and lightness of the baked product. a As important as fermentation is, the conventional methods of bread manufacture require extended periods of fermentation time to achieve the beneficial results noted above. Although attempts have been made to shorten the fermentation time, these have generally been done wtih some sacrifice in one or more of the benefits that fermentation is noted for.

The two basic and conventional methods for the manufacture of yeast raised bread products are known as the Straight Dough method and the Sponge Dough method. In both methods, long periods are devoted to the fermentation processes which are essential to achieve workability or processability of the dough and to develop the desired qualities of grain texture, loaf volume and flavor.

In the Straight Dough method all the ingredients of the formula, e.g. flour, sugar, shortening, milk powder, salt, yeast and water, are mixed into a pliable dough until it is fully developed or clears the sides of the mixer. The dough then is allowed to ferment for 1 /2 hours to 3 hours under controlled temperatures of 80-86 F. The dough is then divided, rounded, and given intermediate proof. It is then molded into designated shapes. The molded doughs are then panned and then proofed for 50-70 minutes at temperatures of 100l05 F. and 90-95% humidity. The proofed dough pieces are then baked at varying temperatures from 375450 F. for times varying from 18 minutes to 30 minutes based on their size and quality level. Although the chemical activity associated "ice with fermentation continues from the time of original mixing until baking of the loaf, it is nonetheless necessary to devote an elapsed period of between 1 /2 and 3 hours solely to the development of the proper dough properties through the fermentation process.

In the Sponge Dough method there is initially formed a sponge batch utilizing only part of the ingredients. The sponge is fermented over a long but wide ranging time, and is subsequently mixed with the remaining ingredients prior to baking. For example, approximately 70% of the flour in the batch is mixed for about 6 minutes in a horizontal mix or along with the yeast and equivalent amount of water to produce a stiff dough with very little development. This is the sponge. The sponge temperature is set at approximately 78 F. and then allowed to ferment in troughs for between 2 /2 to 5 hours. The sponge is then remixed with the other 30% of the flour and the rest of the ingredients, e.g. shortening, sugar, milk powder, salt and water. Afterthe dough is again formed in slow speed in about one minute, it is then mixed in high speed for approximately ten minutes to full development. Then the dough is allowed to rest or relax in troughs for from 15 to 30 minutes, dependent upon the product to be produced, before automatic dividing. This rest period is called floor time. The dough is then processed as in the Straight Dough method for White bread through dividing, rounding, intermediate proofing, molding, panning, proofing and baking.

The Sponge Dough process is today the more commercially accepted method for preparation of yeast leavened baking products. This is due in part to advantages in scheduling permitted by the flexible fermentation schedule of the sponge and in part to the superior processability and also improved grain and tenderness as compared with the Straight Dough method.

Nonetheless, the Sponge Dough method has the decided drawbacks of requiring an extended fermentation period in the first instance and then requiring a fairly critical processing schedule once the dough has been re-mixed. The first drawback causes an extraordinarily long preparation schedule, tying up much equipment and room, and the second drawback risks the ruination of the dough through improper timing-whether caused by inadvertence or by mechanical failure.

It is therefore a primary object of the present invention to provide a new bread making process that will essentially eliminate the fermentation time heretofore conventionally required for bread manufacture, while at the same time retaining and even improving upon the beneficial characteristics associated with the fermentation process.

It is an object of the present invention to provide a new bread making process in which steps of manufacture are simplified and the overall time for manufacture is substantially reduced.

It is a further object of the present invention to provide a quick and reliable method for the manufacture of yeast leavened bread dough products having improved volume, grain, texture, flavor and shelf life.

It is another object of the present invention to provide a novel bread dough composition which promotes outstanding processing characteristics and improved baked laead quality, including outstanding freshness and shelf In general, according to one aspect'of the instant invention, an otherwise conventional bread dough recipe is modified to include about .03 to 0.5% of an ammonium salt, about 00005 to 0.01% of an oxidizing agent, and catalytically active quantities of fungal alpha amylase enzyme and fungal protease enzyme (all percentages based on weight of total flour in the dough).

The present invention is predicated on thed iscovery that a particular combination and concentration of oxidizing agent, ammonium salt and enzyme permits a remarkable reduction in the fermentation time without any sacrifice in the physical or eating qualities of the bread product. Indeed, it has been found that the time ordinarily associated with fermentation in the Straight Dough and Sponge Dough processes can be eliminated entirely, there being provided only the relatively short floor time prior to proofing.

As a result of the elimination of the standard time devoted to fermentation, it is possible to make the bread product by a convenient and substantially faster Straight Dough method, while at the same time exceeding the superior qualities associated with the Sponge Dough process. In this respect the inventive process eliminates all need for Sponge Dough proced-uring and the accompanyingproblems of storage, inventory, floor space and dough trough capacity. It also minimizes the losses due to mechanical failure or other uncheduled stoppages.

Unlike ordinary prolonged Straight Dough procedures, the fast process of the invention is characterized by doughs that maintain good extensibility (as evidenced by their ability to sheet out readily without tears or weak spots) and excellent easy processing properties on machinery. The loaf itself may absorb 1 to 3% more moisture than ordinary bread and have a volume that is as much as 5 to larger than comparable breads made by conventional methods and recipes. Moreover, the breads of the instant invention are found to possess texture, grain and keeping qualities that exceed that of typical good loaves prepared by conventional means.

The unexpected results are associated with the combined effect of the three components: ammonium salt, oxidizing agent and selected enzymes.

The ammonium salt apparently serves as a nutrient in the growth and reproduction of the yeast cells used in fermentation of bread dough and accelerates the production of carbon dioxide. Suitable salts are ammonium chloride, ammonium sulphate, mono-ammonium phosphate and diammonium phosphate. Of these, the most suitable appears to be the di-ammonium phosphate. The effective concentration of the ammonium salt, when used in combination with the other ingredients is in the range of about 0.03% to 0.5% based on the weight of total flour. The preferred concentration of di-ammonium phosphate is about 0.16% based on flour weight.

The oxidizing agent is itself, like the ammonium salt, an old ingredient in the baking art. The use of oxidizing agents has been suggested in some baking processes which are said to reduce fermentation time. These proposals, however, require different combinations than that described here and are not believed to be as effective as the present invention in achieving good machine processability and in improving product quality.

According to the present invention the most useful oxidizing agents are potassium iodate, potassium bromate and mixtures of them. Potassium iodate is most effective when used in the concentrations of 0.0005 to 0.003% based on total uour, and potassium bromate is most effective in the range of 0.001% to 0.01% based on Weight of total flour. The bromate and the iodate are advantageously used together, and in such case the ratios are preferably maintained in the range of 1:3 to 1:8, potassium iodate to potassium bromate. A particularly effective combination is .001% potassium iodate and 0.004% potassium bromate, which is, of course, a ratio of 1:4.

It is believed that the reason that this combination is particularly effective is because the potassium iodate tends to show its effectiveness very early whereas that of the potassium bromate, which is sensitive to pH, is delayed somewhat by the slow development of fermentation acids. As a result, the iodate is effective predominantly right after the mixing stage whereas the bromate extends its effectiveness through the dough stage, the proofing stage a dthe firs po t on of the bake.

It would appear that the oxidizing agent functions to oxidize the natural reducing agents found in yeast, milk, and, most importantly, flour. Oxidizing doughs are aided in their development to tolerate machine handling through improved extensibility and dryness. Such doughs produce bread of fine grain, good texture, increased volume, improved tenderness and longer shelf life.

Although potassium iodate and bromate have been referred to prominenfly herein, it is recognized that other oxidizing agents can be used in this invention, and eX- amples of such are ammonium persulfate, L-ascorbic acid, calcium bromate, calcium iodate, calcium peroxide, chlorine, chlorine dioxide and benzoyl peroxide.

The third necessary component in a dough mix according to the invention is an enzyme mixture. In particular, the enzymes that have been found to be useful in the invention are combinations of fungal amylase and fungal protease.

These two enzymes, when incorporated into a bread dough formula together with the oxidizing agent and the ammonium salt, appear to act as biochemical catalysts that accelerate the rate of the chemical reactions, particularly the reactions which produce carbon dioxide gas, modify the flour starch, condition the gluten to retain gas and leaven the bread for baking.

Flour naturally contains cereal enzymes known as alpha and beta amylase. Together they are known as diastase. The beta form is usually present in effective amounts, but the alpha form is not. This deficiency has, in the past, been remedied by the incorporation of ground malted wheat. However, such a procedure has often resulted in sticky doughs and excessive softening of the bread crumb structure through excessive dextrinization. This is brought about by the fact that during the baking process cereal alpha amylase reaches its peak activity at the same temperature (about 160 F.) that starch gelatinization is accelerating.

However, the supplemental enzymes provided by the instant invention eliminate this drawback and at the same time promote the proper chemical reactions at the time they are needed.

One of these enzymes is fungal alpha amylase, which is derived from the mold Aspergillus oryzae. It functions to modify the amylase and amylopectin fractions of the flour starch and effects a reduction in dough viscosity. The initial action occurs prior to baking but during fermentation when fungal alpha amylase hydrolyzes the small percentage of flour starch (25% damaged in the milling process to dextrins, and the beta amylase converts "the dextrins to sugar. Since the quantity of damaged flour'starch is so low, no over-dextrinization occurs at this stage.

Subsequently, during the baking, the undamaged flour is gelatinized (beginning at about F.) and only then does it become susceptible to enzymatic action. However, at the temperatures encountered during this process the activity of the fungal alpha amylase is decreasing. Indeed, the'fungal alpha amylase is so much more heat sensitive than cereal amylase that it is only 50% active at 150 F. and is only about 3% active at 176 F. By reason of the lower inactivation temperatures of the fungal alpha amyla'se there is avoided the risk of over-dextrinization and the consequent undesirable gummy bread crumb.

'The fungal alpha amylase, in conjunction with the naturally occurring beta amylase carry out the function of converting starch to sugars so as to increase the availability of maltose and dextrose to the yeast cells,

which, in turn, convert them to carbon dioxide, alcohol and flavor components. The resulting bread is resistant to firming on aging and has improved volume, grain, texture and crust color.

The fungal protease enzyme is derived from Aspergillus oryzae. It is not normally found in flour and wheat protease has practically no effect on modifying the fiour gluten, and even the malted wheat flour sometimes added to compensate for lack of alpha amylase has far less protease activity than is needed.

According to the invention, however, effective amounts of a fungal protease are used in combination with the fungal alpha amylase, ammonium salt and the oxidizing agent. It is believed that, in part, the fungal protease catalyzes the hydrolysis of flour gluten by splitting the peptide linkages between the amino acids composing the complex and massive molecular structure of the protein. However, the fungal protease does not destroy the hydrogen and disulfide bonds of the amino acid chains, and it therefore complements and balances the effect of mixing and of oxidizing agents on the gluten.

Many advantages are associated with the proteolytic activity of the enzyme. Chief among these are a decreased mixing time, improved gas retention by the gluten, and acceleration of and development of dough extensibility and processability. The proteolytic activity also results in reduced proof time and improved pan flow. Moreover, it is found that loaves prepared with the proper proteolytic action have greater volume and improved symmetry as well as improved grain, texture and flavor.

Because the effects of the fungal protease and the fungal alpha amylase are complementary, they are used most effectively together. The activity of the fungal alpha amylase can be expressed in terms of SKB units, and the preferred level of activity is that provided by about 54,000 SKB units per 100 pounds of flour. However, both lesser and greater amounts are satisfactory. When levels in excess of about 150,000 are used, no detrimental effects are noted but there is a decided leveling off of beneficial enzyme activity, and hence from the cost standpoint there is a practical upper limit. At less than 3,000 SKB units it is difiicult to appreciate the improved effects and therefore such a level may be considered a practical lower limit.

The activity level of the fungal protease enzyme is conveniently expressed in terms of hemoglobin units. The preferred effective level of fungal protease in bread dough mixtures made according to the invention is 250,- 000 HU units per 100 pounds of flour, however, both greater and lesser amounts are suitable, i.e. within the range of about 3,000 to 500,000. Higher levels tend to liquefy the bread and a practical upper limit may be achieved where the liquefaction is in excess of that tolerated by the particular bread being made. Below about 3,000 HU it is difficult to perceive the improvement.

Although a protease level of 250,000 HU units per 100 pounds flour is high, the activity is a function of time, and high levels are suited to the shortened processing schedule permitted by the instant invention, particularly in view of the inhibiting effect of salt on proteolytic action. The inhibiting effect of salt may be as high as 60% or more and for this reason variations in the salt levels may alter the optimum requirements of protease enzyme.

A typical and very satisfactory recipe according to the instant invention is given in Table I below.

TABLE I Amount added to dough batch Ingredient: containing 100 lbs. of flour Potassium iodate pound .001 Potassium bromate do .004 Di-ammonium phosphate do 0.160 Fungal alpha amylase, SKB units 54,400 Fungal protease, HU units 250,000

The storing, handling and incorporation of all of the components constituting the bread improver of the invention into a dough mix is most conveniently accomplished by means of a packaged mix which contains all of the ingredients in concentrated form in a filler medium. The filler is itself basically a dough mix of flour, shortening, sugar, salt, etc. which can be readily incorporated into the master dough batch.

As mentioned before, bread compositions and additives have been previously proposed for the purpose of reducing or eliminating fermentation time. However, until now such effect was achieved only by some sacrifice in bread quality. The instant invention is formulated to eliminate fermentation time while maintaining or even improving bread quality. Comparative tests on a commercial scale as set forth below in Example 1 confirm these findings.

Example 1 Two bread doughs were prepared, both with 700 pounds of flour. One of these was a standard dough formulation containing additives intended to reduce fermentation time and improve product quality (cysteine, whey, potassium bromate) and which had incorporated therein a brew (water, sugar, yeast, Brewloid yeast food) which had been given a pre-ferment of 1 hour. The other was a standard dough into which was incorporated the composition of the instant invention in concentrations shown in the table above. The ingredients for both doughs were initially mixed at low speed for one minute and at high speed for eleven minutes. No independent fer-mentation or sponge time was allotted to either batch (except that the control bread contained a brew as mentioned above). Both doughs were processed on the following schedule:

Floor time, min. 1 30 Dough temp., F. 84 Make-up time, min. 30 Proof time, min. 55 Bake time, min. 23

Bake temp., F. 420

40 for control.

During processing the dough of the invention indicated superior dough sheeting (extensibility) and pan flow as compared with the standard quick dough.

After baking both breads were found to be acceptable. However, the loaf made according to the invention had 10% larger volume. Moreover, the bread of the invention was found superior in grain, texture and crust color. In most other respects the breads were equivalent, except that the bread made according to the invention exhibited superior shelf life. In general, the relaxation or floor time of a yeast leavened bread dough product of the invention need be no greater than about 40 minutes. The invention readily lends itself to either batch or continuous operation.

Although extended shelf life is an important benefit of using the basic composition of the invention, it has been unexpectedly found that the freshness of bread prepared according to the invention can be extended for considerable periods of time by the addition of small quantities of certain surface active agents or emulsifiers.

Of particular interest here are calcium stearyl-Z-lactylate and sodium stearyl fumarate. Both of these emulsifiers are known as being useful in extending the shelf life of bread. However, we have discovered that even normal levels of such emulsifiers exhibit unusual activity in the presence of the oxidizer-ammonium salt-enzyme additives of the present invention. The effect is apparently synergistic, and the result has been to extend the useful shelf life of the bread by as much as 3 days as contrasted with breads having no emulsifier and by as much as 2 days for breads having equivalent amounts of emulsifying agent but not containing the three component system of the invention. The effectiveness of the emulsifiers is greater for larger quantities; however, significant effects are achieved predominantly with concentrations in the range of 0.25 to 0.50 part per parts of flour.

A convenient way of measuring bread freshness and hence the shelf life of the bread is by means of a compressimeter. This is an instrument that measures the deformation of the bread slice by a predetermined applied force. Readings are high for more tender slices of bread and consequently are considered to be of higher quality.

As the readings are recorded over a period of days, the loaves of higher quality have a slower rate of increased firmness and the compressimeter readings wont decrease as rapidly as those for loaves of lower quality. It has been established that compressimeters are a measure of the consumers squeeze test and eating quality of bread loaves since the majority of consumers prefer bread of a soft silky texture.

As shown below in Example 2 a bread product utilizing the combination of an oxidizing agent, an ammonium salt, amylase-protease enzymes, and an emulsifier selected from the group consisting of calcium stearyl-2-lactylate and soafter bake, and then sliced into 21 slices having a thickness of A of an inch. Bread slices #3, 7, ll, and 19 were used for compressimeter readings for each bread loaf. The Hansaloy compressimeter measures freshness by measuring the depression (in millimeters) caused by dropping a weighted plunger onto the bread slice. The depression is registered on a scale having units of 0 to 30. These readings are averaged for each loaf, and are compared with the averaged readings of other similar loaves of bread at various time intervals.

The compressimeter readings are given below in Table II for each of the types of bread prepared.

CSL-calcium stearyl-2-lacytlate. SSF-sodium stearyl fumarate. Bread improver-See Table I. Pete ent based on weight of total flour.

dium stearyl fumarate, had a freshness as measured by a compressimeter that was markedly improved over what could be expected by standard bread dough containing the same emulsifiers.

Example 2 Doughs for white bread were prepared from a standard recipe containing- Together these ingredients formed a standard control dough formulation to which other ingredients were added. One portion of the dough was prepared using, in addition to the above ingredients, the three component system of the present invention in the recipe quantities set forth above in Table I. Portions of this latter dough were prepared in which in addition to the ingredients of Table I there was added varying quantities of either sodium stearyl fumarate or calcium stearyl-Z-lacylate. Both of these two surface active agents were also separately incorporated into a portion of the standard dough which did not contain the oxidizer, enzyme, or ammonium salt components.

All of the doughs containing the three component system of the invention were processed under the following conditions:

(1) Mixing for 15 minutes to full development; dough temperature at 82 F.

(2) No fermentation time; floor time of 20 minutes before dividing.

(3) Intermediate proof of 15 minutes; proof of 70 minutes at 105 F. and 95% humidity.

(4) Bake for minutes at 425 F.

The doughs which did not contain the three component system of the invention were processed under the identical conditions except that after the mixing step a fermentation period of 1 /2 hours was allowed.

Each of the baked loaves were periodically tested for freshness by means of a Hansaloy bread softness gauge as follows: The white bread loaves of approximately 1 lb. net weight were stored in waved paper bags 1 hour It is seen that considerable improvement in shelf life was obtained by incorporating the emulsifying agents into a bread dough recipe containing selected portions of oxidizer, enzyme and ammonium salt (as specified more particularly in Table I). There was an even more significant improvement compared with breads which contained similar quantities of emulsifier but no bread improver according to the present invention.

At almost anytime past the first 24 hours, when most breads show substantial freshness, the breads containing both the basic bread improver and the emulsifying agent of the present invention were found to be at least 24 hours fresher than the counterpart bread having the same emulsifier but no bread improver. For instance, the bread prepared according to the invention and having /2% CSL had a freshness rating after 72 hours (9.2) that was superior to that of the corresponding bread not having the bread improver of the invention after only 24 hours (9.0). Similar comparisons can be made for the other corresponding breads.

Not only does the emulsifier when used according to the invention show a substantial improvement in bread shelf life as compared with standard formulations containing the same quantities of the same emulsifiers, but there is a significant improvement as compared with breads containing the novel basic bread improver of the invention.

For example, the results of Example 2 indicate that the bread having /z% SSF plus the bread improver had a freshness after 96 hours that would be comparable with that achieved by ordinary white bread after only 24 hours and that achieved by the control bread having the bread improver after only 72 hours.

What we claim is:

1. A yeast leavened bread dough containing a composition consisting essentially of about 0.0005 to 0.013 part by weight per 100 parts of flour employed in said dough of an oxidizing agent, about 0.03 to 0.5 part by weight of ammonium salt per 100 parts fiour employed in said dough, and catalytically active quantities of enzyme selected from the class consisting of fungal alpha amylase and fungal protease, wherein said fungal alpha amylase enzyme is suflicient to provide between 3,000 and 150,000 SKB units for 100 pounds of flour employed in said dough and said fungal protease enzyme is sufiicient to provide between 3,000 and 500,000 hemoglobin units for 100 pounds of flour employed in said dough.

2. The bread dough composition according to claim 1 wherein the oxidizing agent is selected from the class consisting of potassium iodate and potassium bromate.

3. The bread dough composition according to claim 2 wherein said potassium iodate is selected in amounts of about 0.0005 to 0.003 part per 100 parts flour, and said potassium bromate is selected in amounts of about 0.001 to 0.01 part per 100 parts of flour.

4. The bread dough composition according to claim 3 wherein said potassium iodate and said potassium bromate are selected as a mixture and the ratio of the iodate to the bromate is between 1:3 and 1:8.

5. The bread dough composition according to claim 1 wherein said ammonium salt is diammonium phosphate.

6. The bread dough composition according to claim 1 wherein said fungal alpha amylase and said fungal protease are both present in catalytically active quantities.

7. The bread dough composition according to claim 6 wherein:

(1) said oxidizing agent is potassium iodate in proportion of about .001 part by weight and potassium bromate in proportion of about .004 part by weight for 100 parts of flour employed in said dough;

(2) said ammonium salt is di-ammonium phosphate in proportion of about .160 part by Weight for 100 parts of flour employed in said dough; and

(3) said fungal alpha amylase is in proportion of about 54,400 SKB units and said fungal protease is in proportion of about 250,000 hemoglobin units for 100 pounds of flour employed in said dough.

8. The bread dough composition according to claim 1 which contains, in addition, an emulsifier selected from the class consisting of sodium stearyl fumarate and calcium stearyl-2-lactylate.

9. The bread dough composition according to claim 8 wherein the amount of said emulsifier is selected between about 0.25 and 0.50 part per 100 parts flour.

10. The process for making a yeast leavened bread dough product comprising the steps of:

(a) forming a dough by combining normal bread dough ingredients including flour, water, milk solids, sugar and salt with 1) an oxidizing agent selected from the group consisting of potassium bromate in weight proportion of between about 0.001 to 0.01 part for 100 parts of flour and potassium iodate in weight proportion of between about 0.0005 to 0.003 part for 100 parts of flour, (2) about .003 to 0.5 part by weight of an ammonium salt for 100 parts of flour and (3) an enzyme selected from the group 10 consisting of (i) fungal alpha amylase to provide at least 3,000 SKB units for pounds of flour and, (ii) fungal protease to provide at least 3,000 hemoglobin units for 100 pounds of flour, said combination step being accomplished with essentially no independent fermentation time:

(b) substantially immediately relaxing the dough for a period not in excess of 40 minutes; and

(c) substantially immediately processing the dough for proofing and baking.

11. The process according to claim 10 wherein in the mixing step there is added the additional ingredient of an emulsifying agent selected from the class consisting of sodium stearyl fumarate and calcium stearyl-Z-lactylate.

12. The process according to claim 11 wherein said emulsifying agent is present in amounts between about 0.25 and 0.50 part per 100 parts of flour. Y

13. The process according to claim 10 wherein both said potassium bromate and said potassium iodate are selected, and the ratio of the amount bromate to the amount of iodate is between 1:3 and 1:8.

14. The process according to claim 13 wherein the ratio of potassium bromate to potassium iodate is about 1:4.

15. The process according to claim 10 wherein said fungal alpha amylase enzyme provides between about 3,000 and 150,000 SKB units and said fungal protease enzyme provides between about 3,000 and 500,000 hemoglobin units.

16. The process according to claim 15 wherein said fungal alpha amylase provides about 54,000 SKB units and the fungal protease provides about 250,000 hemoglobin units.

References Cited UNITED STATES PATENTS 3,066,029 11/1962 Ieffreys 99-90 3,343,964 9/1967 Thomas 99-91 XR FOREIGN PATENTS 770,072 3/1957 Great Britain.

ALVIN E. TANENHOLTZ, Primary Examiner J. R. HOFFMAN, Assistant Examiner US. Cl. X.R. 9991 In the S ecification CoIwnn I Ifie 2 1 delete 50,000 and insert therefor --500,000--;

$6.5m I UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent N0 QJI-Q L'T'TO Dated February 10, 1970 Inventor(S) Louis Joseph Smerak and Jason Alden Miller 1: is certified that error appears in the aboveidentif-ied patent and that said Letters Patent are hereby corrected as shown below:

Column 1, line 48 delete "wtih" and insert therefor --with--. Column 2, line 71 delete 'thed iscovery" and insert therefor --the discovery--. Column 3, line 19 delete "uncheduled" and insert therefor --unscheduled--; Column 3, line 29 delete "uour" and insert therefor ---flour--. I Column line l4 after "mix" insert --ma.de--. Column 5, line 44 delete "liquefy" and, insert therefor --liquify--. Column 7, line 29 delete "dough" and insert therefor --doughs--; Column 7, line 75 delete "waved" and insert therefor --wa.xed-,--.

In the Claims Column 9, line 46 within sub-grouping (2) delete ".003" and insert therefor --0.03--.

SIGNED AND RFAlI-TD Auemm 

